I have the same issue - my Store Doesn't Exist. I didn't change my store
name or anything with it, but it seems to have just "vanished".
Hopefully just a glitch that will be fixed soon.
Unless you take the packages to the post office and wait an hour in
their line (typically that long here!) to get them scanned in as
"accepted", then eBay considers the post office's first scan as the time
they accept the package - typically could be...
Leave them a negative feedback so future buyers are aware - this has
happened to me and I cannot stand it. Not just with sellers from China,
but also from South America. I typically will only buy from US Sellers
because I want the items delivered QUI...